We report a feasibility study of Time-of-Flight technique in Short- and Mid-Wavelength Infrared spectral region using a Mercury Cadmium Telluride detector. For the demonstration we employed an all-optical modulator operated by optical pumping with 800 nm, 100 femtosecond pulses and measured the broadening of the signal pulses traversing through a few centimetres of silica rod. The measured signal was analysed to reconstruct the pulse broadening and to retrieve the group velocity dispersion of silica. We show that in Time-of-Flight measurements based on all-optical modulation in combination with Mercury Cadmium Telluride detector, the limiting resolution factor is the speed of the modulator rise time governed by the optical pump.
Rihan Wu, Jack Collins, Christopher D. Burgess, Robert A. Lamb, and Andrey Kaplan, "Demonstration of time-of-flight technique with all-optical modulation and MCT detection in SWIR/MWIR range," Proc. SPIE 10799, Emerging Imaging and Sensing Technologies for Security and Defence III; and Unmanned Sensors, Systems, and Countermeasures, 1079904 (Presented at SPIE Security + Defence: September 12, 2018; Published: 4 October 2018); https://doi.org/10.1117/12.2500326.
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